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Aqueous dispersion of hollow polymer particles and method of production of same

a technology of hollow polymer particles and dispersion water, which is applied in the direction of coatings, etc., can solve the problems of poor work efficiency and high cost of polymerization reactors

Inactive Publication Date: 2016-01-28
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method for making a special kind of polymer that can be mixed together to form a smooth and viscous liquid. This liquid can be used to make things like plastics and skimming films. The method produces little clumps of the polymer, which makes it easier to mix and use. There is also a product made using this method that is smoother and more uniform.

Problems solved by technology

When producing an aqueous dispersion of hollow polymer particles, for removing residual monomers in the aqueous dispersion derived from the polymerization reaction, steam stripping in which steam (saturated water vapor) is blown is suitably used but in the conventionally known method of production of an aqueous dispersion of hollow polymer particles, there were also the problems that the amount of the coagulum in the aqueous dispersion of hollow polymer particles after performing the polymerization step, base treatment step, and residual monomer removal step is relatively large, the filtration time for removing this coagulum by filtration is long, so the productivity is poor, and, further, the frequency of cleaning the polymerization reactor is high, so the work efficiency is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0088]Production of Core Polymer Particle (A)

[0089]To a reaction vessel equipped with a stirring device, methyl methacrylate 50 parts, butyl acrylate 10 parts, methacrylic acid 40 parts, sodium polyoxyethylene alkyl ether sulfate 0.9 part, sodium tripolyphosphate 0.15 part, and ion exchanged water 80 parts were charged, then stirred to prepare an emulsion of a monomer mixture (a-1) for forming core polymer particle.

[0090]Next, separate from the above, to a reaction vessel equipped with a stirring device, ion exchanged water 800 parts, methyl methacrylate 100 parts, sodium dodecylbenzene sulfonate 5 parts, and potassium persulfate 5 parts were charged and stirred, then the reaction vessel was raised in temperature to 80° C. to perform a polymerization reaction to thereby obtain a volume average particle size 82 nm seed latex (S-1).

[0091]Further, to a reaction vessel equipped with a stirring device, the above obtained seed latex (S-1) 0.28 part (converted to solid content) was charged...

example 2

[0107]To a reaction vessel equipped with a stirring device, monomers 100 parts (styrene 99.0 wt %, acrylic acid 1.0 wt %), sodium polyoxyethylenealkylether sulfate 0.6 part, and ion exchanged water 80 parts were charged and then stirred to prepare an emulsion of a monomer mixture (c-2) for forming the intermediate shell layer (C).

[0108]Further, except for changing the amount of the emulsion of the monomer mixture (a-1) for forming the core polymer particle (A) from the monomer mixture (a-1) 10 parts to the monomer mixture (a-1) 11.5 parts and using a monomer mixture for forming the intermediate shell layer (C) constituted by, instead of the emulsion of the monomer mixture (c-1) (amount of monomer mixture (c-1) 49 parts), the above prepared emulsion of the monomer mixture (c-2) (amount of monomer mixture (c-2) 49 parts), the same procedure was followed as in Example 1 to obtain an aqueous dispersion of hollow polymer particles.

[0109]Next, the obtained aqueous dispersion of hollow pol...

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Abstract

A method of production of an aqueous dispersion of hollow polymer particles including forming, on the outer layers of core polymer particle (A) on which inside shell layer (B) and intermediate shell layer (C) are formed, outside shell layer (D) obtained by using a monomer mixture (d) with a ratio of content of an acidic group-containing monomer controlled to 0.15 wt % or less and adding a base to an aqueous dispersion of the obtained polymer particle to make the pH of the aqueous dispersion 7 or more is provided.

Description

TECHNICAL FIELD[0001]The present invention relates to an aqueous dispersion of hollow polymer particles and a method of production of the same.BACKGROUND ART[0002]In recent years, the methods of printing books, magazines, and other publications; handbills, pamphlets, posters, and other commercial advertising; and other printed matter have become diversified. From the viewpoint of the adaptability to single color printing and multi color printing in a broad range of applications, improvement of the opacity and absorbability of the coated paper has been sought.[0003]In the past, a coating composition which contains hollow polymer particles has been used for production of coated paper. For example, Patent Document 1 discloses a method of producing an aqueous dispersion of hollow polymer particles which comprises taking an aqueous dispersion which contains polymer particles having a three-layer structure of a core polymer particle (A), shell layer (B), and shell layer (C) by adding a ba...

Claims

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Application Information

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IPC IPC(8): C08L33/12
CPCC08L33/12C08L2205/025C08L2205/035C08F285/00C08F220/06C08F212/08C08F220/14C08F220/1804
Inventor YAMAGUCHI, ATSUSHI
Owner ZEON CORP